There are endless reasons why this issue of unrecoverable error in QuickBooks desktop might have occurred. You need to access the cause closely to get the best solution. In order to do that, here are a few common causes that might have triggered the issue.
If your Quickbooks component is corrupted or is damaged; that might cause this problem.
In case of a network blip, you will get this issue on your screen.
Also, when there is an issue with your data integrity; this also causes the unrecoverable issue.
Damage or corruption in your data can also be a prime reason or cause of this problem.